Browse Prior Art Database

FUSER LIFE INDICATOR

IP.com Disclosure Number: IPCOM000026029D
Original Publication Date: 1989-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 52K

Publishing Venue

Xerox Disclosure Journal

Abstract

A fuser or developer unit for use in xerographic apparatus and which has a finite life is fitted with a "useful life left" indicator to indicate to an unskilled operator when the component needs to be replaced by a fresh one. The life indicator is intended to be preset with a number corresponding to the usable life foreseen for that component. When it is position in the machine, the number is decremented in accordance with a parameter related to the wear or use of the component. Thus the number may be decremented in accordance with the number of revolutions of a photoreceptor; number of copy sheets passed through the machine; amount of release agent left in a sump or reservoir; time held above a chosen temperature, or in accordance with wear-related signals from the machine.

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CEROX DISCLOSURE JOURNAL

FUSER LIFE INDICATOR

Proposed R. A. Carter Classification

U.S. C1.355/200 Int. C1. G03g 15/00

A fuser or developer unit for use in xerographic apparatus and which has a finite life is fitted with a "useful life left" indicator to indicate to an unskilled operator when the component needs to be replaced by a fresh one. The life indicator is intended to be preset with a number corresponding to the usable life foreseen for that component. When it is position in the machine, the number is decremented in accordance with a parameter related to the wear or use of the component. Thus the number may be decremented in accordance with the number of revolutions of a photoreceptor; number of copy sheets passed through the machine; amount of release agent left in a sump or reservoir; time held above a chosen temperature, or in accordance with wear- related signals from the machine.

As an alternative to a numerical display, the life indicator can display letters; movement of a line or boundary along a scale, or symbols of which the appearance changes with machine use.

The display may indicate life left; life used; life to some warranty limit, or a combination of these.

Volume 14 Number 5 September/October 1989 259

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     XEROX DISCLOSURE JOURNAL Volume 14 Number 5 September/October 1989

260

[This page contains 1 picture or other non-text object]